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powerpc/44x: Change GPIO driver to a proper platform driver

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In order to drop legacy-of-mm-gpiochip dependency, first change the
44x GPIO driver to a proper platform driver.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/29d89aa43536714b193d9710301341f838fcb5b7.1755519343.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2025-08-18 14:17:34 +02:00 committed by Madhavan Srinivasan
parent 7f9bcf1306
commit 1044dbaf2a
1 changed files with 41 additions and 32 deletions
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73
arch/powerpc/platforms/44x/gpio.c
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@ -18,6 +18,7 @@
#include <linux/gpio/driver.h> #include <linux/gpio/driver.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/platform_device.h>
#define GPIO_MASK(gpio) (0x80000000 >> (gpio)) #define GPIO_MASK(gpio) (0x80000000 >> (gpio))
#define GPIO_MASK2(gpio) (0xc0000000 >> ((gpio) * 2)) #define GPIO_MASK2(gpio) (0xc0000000 >> ((gpio) * 2))
@ -155,42 +156,50 @@ ppc4xx_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
return 0; return 0;
} }
static int __init ppc4xx_add_gpiochips(void) static int ppc4xx_gpio_probe(struct platform_device *ofdev)
{ {
struct device_node *np; struct device *dev = &ofdev->dev;
struct device_node *np = dev->of_node;
struct ppc4xx_gpio_chip *chip;
struct of_mm_gpio_chip *mm_gc;
struct gpio_chip *gc;
for_each_compatible_node(np, NULL, "ibm,ppc4xx-gpio") { chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
int ret; if (!chip)
struct ppc4xx_gpio_chip *ppc4xx_gc; return -ENOMEM;
struct of_mm_gpio_chip *mm_gc;
struct gpio_chip *gc;
ppc4xx_gc = kzalloc(sizeof(*ppc4xx_gc), GFP_KERNEL); spin_lock_init(&chip->lock);
if (!ppc4xx_gc) {
ret = -ENOMEM;
goto err;
}
spin_lock_init(&ppc4xx_gc->lock); mm_gc = &chip->mm_gc;
gc = &mm_gc->gc;
mm_gc = &ppc4xx_gc->mm_gc; gc->ngpio = 32;
gc = &mm_gc->gc; gc->direction_input = ppc4xx_gpio_dir_in;
gc->direction_output = ppc4xx_gpio_dir_out;
gc->get = ppc4xx_gpio_get;
gc->set = ppc4xx_gpio_set;
gc->ngpio = 32; return of_mm_gpiochip_add_data(np, mm_gc, chip);
gc->direction_input = ppc4xx_gpio_dir_in;
gc->direction_output = ppc4xx_gpio_dir_out;
gc->get = ppc4xx_gpio_get;
gc->set = ppc4xx_gpio_set;
ret = of_mm_gpiochip_add_data(np, mm_gc, ppc4xx_gc);
if (ret)
goto err;
continue;
err:
pr_err("%pOF: registration failed with status %d\n", np, ret);
kfree(ppc4xx_gc);
/* try others anyway */
}
return 0;
} }
arch_initcall(ppc4xx_add_gpiochips);
static const struct of_device_id ppc4xx_gpio_match[] = {
{
.compatible = "ibm,ppc4xx-gpio",
},
{},
};
MODULE_DEVICE_TABLE(of, ppc4xx_gpio_match);
static struct platform_driver ppc4xx_gpio_driver = {
.probe = ppc4xx_gpio_probe,
.driver = {
.name = "ppc4xx-gpio",
.of_match_table = ppc4xx_gpio_match,
},
};
static int __init ppc4xx_gpio_init(void)
{
return platform_driver_register(&ppc4xx_gpio_driver);
}
arch_initcall(ppc4xx_gpio_init);